Refrigerating apparatus



B: y 19311 o. QMJSUQMMERS 6 REFRIGERATING APPARATUS Filed Jan. 51, 1928 I 5' .2. n I ame/mica Patented July l, 1930 UNITED STATES PATENT OFFICE OTTO M. SUMMERS, OF DAYTON, OHIO, ASSIGNOR TO FRIGIDAIBE CORPORATION, 01

I DAYTON, OHIO, A CORPORATION OF DELAWARE REFRIGERATIN G APPARATUS Application-filed January 31, 1928. Serial No. 250,828.

This invention relates to refrigerating apparatus and particularly to reservoirs or re-- ceivers for stormg' l1qu1d refrigerants 1n refrigerating systems.

One of the objects of the inventlon is to provide an improved receiver having a s mple and economical fitting for conducting liquid to the rest of the apparatus and for closing communication between different parts of the s stem.

Another ob]ect of the invention is to provide an improved means for filtering refrigerant passing through the system.

Still another object is to provide a filtering fitting in which the filtering element is read-' ily removable for cleaning with a minimum disturbance of the rest of the apparatus.

Further objects and advantages of the present invention will be apparent from the following description, reference be ng had to the accompanying drawing, wherein a preferred form of the present invention is clearly shown.

In the drawings:

Fig. 1 is a diagrammatic representation of t a refrigerating system inwhich my invention is used, and

Fig. 2 is a vertical section of a portlon of the receiver.

The refrigerating system illustrated in the drawings comprises a compressor 10 actuated in response to refrigerating demand by a motor 11 under the control of a switch 12 for withdrawing gaseous refrigerant through a conduit 13 from a refrigerating elementl l,

compressing the refrigerant and delivering it to a condenser 15 where it is liquefied and from which it flows to a tank or receiver 16.

' Liquid refrigerant under pressure flows to the refrigerating element 14 through a conduit 18 under the control of any suitable means such as a float valve 19 in the refriger- ,ating element. The conduits 13 and 18 are nearly to its bottom, through which liquid refrigerant flowsunder the influence of the pressure maintained within the receiver.

. filtering chamber. near the outlet opening 33 is closed by acup- The liquid conduit 18 is connected to the tube The inlet openin 32 is threaded to receive a nipple 38, whic is preferably soldered or sweat-ed to the casing 31. The nipple is threaded at its outer end for attachment to the tube 25 and at its inner end is formed with a valve seat 39. A valve stem 40 is threaded in the valve casing, and-carries a valve 41 adapted toengage the seat 39. to close communication between the receiver and conduit 18'. The valve stem also carries a valve 42 for engaging a seat-43 when the valve 41 is open, to prevent leakage around the stem 40. The stem is also packed with.

suitable lubricating or impregnated packing 44, held in place by a gland 15 and a nut or cap 46. A filtering element within the filtering chamber includes a sleeve 50, which may be either cylindrical or frusto-conical, and which may, if desired, be of filtering material a such as wire cloth. The sleeve'is held in place by a flange 51, integral with or secured to the sleeve, the flange being clam ed between-the connection 35 and the end 0 the wall of the The end of the sleeve shaped screen 53, such as wire cloth, supported by and within the sleeve, as by soldering the edges of the cup and sleeve toggther, with its open end toward the outlet It is to be understood that liquid under comparatively high pressure within the receiver flows upwardly through tube 35 and out through opening 33. The cup-shaped filtering element is supported with its open end toward the outlet opening so that it is placed in tension by the pressure of liquid flowing throughthe filtering'chamber. Thus as the screen collects deposits of solid matter, 0

the system or the admission of air to the system.

While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to he understood that other forms might be adopted, all coming within the scope of the claims that follow.

What is claimed is as follows:

1. In a refri crating apparatus having a refrigerant con uit and a reservoir for liquid refrigerant, a fitting for connecting the reservoir to the conduit comprising the combination of a valve casing having inlet and outlet openings, a filtering chamber formed integral with the casing on the discharge side of the outlet opening, a valve within the casing for closing communication between the o nings, a connection threaded on the wall 0 the chamber for attaching the refrigerant conduit, and a filtering element in the chambe! including a sleeve having a flange clamped between the connection and the wall of the chamber and a cup-shaped screen supported by and within the sleeve with its open end toward said outlet opening.

2. In a refri ratin apparatus having a refrigerant con' uit an a reservoir for liquid refrigerant, a fitting for connecting the reserher, a valve seat formed on said connection and adapted to cooperate with said head, a second conduit connection havin a flan a threaded to the outside of the wal of the ltering chamber, and a filtering element within said chamber including a cylindrical screen having a flange clamped between said second conduit connection and thewall of the filtering chamber and a cup-shaped screen supported by and within the cylindrical screen with its-open end toward said passage.

4. In a refrigeratin apparatus having a refrigerant conduit an a reservoir for liquid refrigerant, a fitting for connecting the reservoir to the conduit comprising the combination of a valve casing having inlet and outlet openings, a filterin chamber secured to the casing on the disc arg' side of the outlet opening, a valve within the casing for closing communication between the openings, a connection threaded on the wall of the chamber for attaching the refrigerant conduit, and a filtering element in the chamber including connection and the wall of the chamber and a cup-shaped screen supported by and within the sleeve with its open end toward 'said outlet opening.

In testimony whereof I hereunto afiix my signature. v

OTTO M. SUMMERS.

voir to the conduit comprising the combination of a valve casing having inlet and outlet openings, a filtering chamber formed integral with the casing on the discharge side of the outlet opening, a valve within the casin for. closing communication between the openm a connection threaded on the wall of t e chamber for attachin the refri erant conduit, and a filtering e ement in t e chamber includingp cylindr cal screen havin a flange clamped etween the connection an the wall of the chamber, and a cup-shaped screen supported by and within the cyhndricalscreen with its open end toward the outlet opening.

3. In a refri eratin apparatus having a refrigerant conduit an a reservoir for liquid refrigerant, a fitting for connecting the reservoir to the conduit comprisin in combination a casing including a valve c amber, a cylindrical boss integrally formed with the casing and including a filtering chamber, said casing having a passage between said chambers, a valve stem in said member having an enlarged head disposed within the valve chamher, a conduit connection threaded to said member and projecting into said valve cham- 

